Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

v3.4.0.3
Subsequent Events (Details)
$ / shares in Units, $ in Millions
Apr. 22, 2016
USD ($)
Apr. 19, 2016
USD ($)
item
$ / shares
shares
Dec. 31, 2015
USD ($)
May. 06, 2014
USD ($)
Subsequent Event Items        
Net proceeds from issuance of common stock | $ $ 13.1   $ 12.7 $ 29.8
Subsequent event        
Subsequent Event Items        
Number of common stock shares available in public offering   2,700,000    
Beneficial ownership of common stock resulting from purchase of stock in public offering   4.99    
Number of warrants or shares of common stock to be sold with one Series A warrant | item   2    
Net proceeds from issuance of common stock | $   $ 13.1    
Series A Warrants | Subsequent event        
Subsequent Event Items        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   4,100,000    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right   1    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares   $ 3.50    
Series B Warrants | Subsequent event        
Subsequent Event Items        
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares   $ 3.48    
Series A Warrant | Series A Warrants | Subsequent event        
Subsequent Event Items        
Number of warrants or shares of common stock to be sold with one Series A warrant | item   2    
Maximum | Series A Warrants | Subsequent event        
Subsequent Event Items        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   5,500,000